Michael Mac Donald

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Persistent insomnia is even worse for you than you thought.<p>In addition to the weight gain, memory problems, inability to perform, depression, and increased cancer risk that come with sleep deprivation, it turns out that not getting enough sleep also allows neurotoxins to build up in your brain, …

Discovery suggests there may be millions more 'supermassive' black holes in the universe than were previously thought<p>Five monster black holes that were previously hidden by dust and gas have been uncovered by astronomers.<p>The British-led discovery suggests there may be millions more "supermassive" …

When will humans get to Mars? What path should they take? And can we afford the trip? These questions have been percolating since Project Apollo, but they're coming into sharper focus — partly because NASA is reviewing its long-term space exploration plans, and partly because there's a presidential …